How many movies have Bruno Grass and Eckhard Vollmar collaborated on?

They have worked on 3 movies together! Their first movie together was Inspector Dupin: Brittany's Secrets (2019) while their highest rated movie together was Inspector Dupin: Brittany's Delicacies (2021). They have not worked together since Inspector Dupin: Brittany's Delicacies (2021). They are most known for their tv movie films together.